It is not every day that astronauts can claim to return to Earth with a new species of life. But when the astronauts on ESA’s CAVES underground training course returned to the surface they were carrying a special type of woodlouse.
CAVES training sends astronauts from all the International Space Station partner nations underground for a week to learn about working in multi-cultural teams under extreme conditions.
During their six-night stay in caves in Sardinia, Italy, their scientific research included meteorology, surveying, geology and cataloguing underground life.
“Every year we scout the area to prepare for the training mission,” says Loredana Bessone, course designer and project manager. “This year, we noticed interesting-looking crustaceans in a small pond.”
The astronauts set bait near the pond and in other places to attract and identify as many life forms as possible. ESA astronaut Andreas Mogensen recalls: “We set four lures in pre-defined areas and had two mobile baits that we placed in areas of interest.”
CAVES 2012 science coordinator Jo de Waele (left) and NASA astronaut Mike Fincke placing bait during the underground training. A mixture of liver and rotten cheese was used to entice subterranean life to visit the area. After three to four days the astronauts returned to the site to collect animals of interest. Molecular analysis confirms some of the life found belong to a new species of crustaceans of the Alpioniscus genus. Credits: ESA–V. Crobu
Cave scientists usually leave bait for three weeks. CAVES training lasts only a week so the biological sampling programme developer, Paolo Marcia, cooked up a special menu to lure the underground life: “I created a really stinky bait made of liver and rotten cheese.” After three to four days, the astronauts chose a few specimens of the less common species and preserved them in alcohol to take above ground.
“We were concerned that not enough cave life had been collected, so I asked the astronauts to go back to the pond on the last day – and bingo!” says Laura Sanna, science operations director.
“Afterwards, we and the astronauts checked the specimens on a list of known species” says Jo de Waele, science coordinator.
Swimming underground woodlice
Molecular analysis confirms the samples belong to a new species of crustaceans. Just under 8 mm long, these animals belong to the suborder of terrestrial isopods, commonly known as woodlice.
Most crustaceans such as crabs, shrimps and lobsters live in water while woodlice are the only group that have fully adapted to life on land.
The ancestors of the terrestrial isopods seem to have evolved from aquatic life to live on land.
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